To provide a biological waste liquid treatment apparatus capable of reducing the BOD (biological oxygen demand) and COD (chemical oxygen demand) levels of a biological waste liquid to suppress the occurrence of organic foreign matter in a flow channel.
This biological waste liquid treatment apparatus for performing cleaning treatment using ozone has a tank for storing the waste liquid, a reaction tank for mixing/reacting the waste liquid and ozone, and a degassing tank for subjecting the treated substance from the reaction tank to gas-liquid separation treatment. Ultraviolet sources are arranged in the solution in the reaction tank and the gaseous phase part in the degassing tank. Further, the biological waste liquid treatment apparatus has the tank for storing the waste liquid, the reaction tank for mixing/reacting the waste liquid and ozone and the degassing tank for subjecting the treated substance from the reaction tank to gas liquid separation treatment, and the mixing of ozone with the waste liquid is performed by the injection due to a nozzle in the tank, the injection in an intermediate flow channel in the tank and the reaction tank, and injection immediately before the reaction tank.
Koichi Kajisaki
Yuzo Ozaki
Toshihiko Taniguchi